- Version 1989
- 175 downloads
Placer Examination Principles And Practice by John H. Wells (BLM)
BLM Technical Bulletin 4 1969 Reprinted with errata 1989, 9.37 MB pdf file, 195 pages
The classic work on evaluating precious metal placer deposits.
Gold Panning, Sluicing, Dredging, Drywashing Forum